Genetic similarity is more precise than a generic toolset. We can tell relationships based on how similar their genes are (assuming you don't deny paternity tests). Genetic evaluation tells us that dogs are 100% descendant from wolves, not wolves and coyotes like previously thought. Genes also tell us that we are distant cousins to chimps. Genes are passed on through descendants and you can trace genes back through their family tree.

Animals on islands are completely unique. That's because they've been cut off from the mainland for millions of years and evolved completely differently. 100% of the mammals native to Australia are marsupials (excluding bats which can fly), and 100% of all marsupials are native to Australia, evolution took a different branch there. Galapagos and Madagascar also have animals that are very different, but they are most similar to the animals closest the island, and those animals are most similar to the animals geographically close to them.

Yes, the fossil record is incomplete (as we should expect), but it completely supports evolution. If you want to disprove evolution, find a single mammal fossil below the Devonean layer. Find a single human fossil that is 10 million+ years old. Why do we see the progression in the fossil record at all? Why are there no vertebrates beyond a certain layer?

Macro-evolution is what happens when micro-evolution has millions of years. They aren't as distinctly different as you seem to think.